Title: Nothing: A Very Short Introduction, Author: Frank Close
Title: Heidegger: A Very Short Introduction, Author: Michael Inwood
Title: At the Existentialist Café: Freedom, Being, and Apricot Cocktails with Jean-Paul Sartre, Simone de Beauvoir, Albert Camus, Martin Heidegger, Maurice Merleau-Ponty and Others, Author: Sarah Bakewell
Title: Existentialism and Excess: The Life and Times of Jean-Paul Sartre, Author: Gary Cox
Title: Sartre in 90 Minutes, Author: Paul Strathern